Toynol® FS-620 Acetylenic Diol Polyether
Toynol® FS-620 Acetylenic Diol Polyether Foam-Control Wetting Agent
Abstract
Toynol® FS-620 is a nonionic gemini surfactant based on an acetylenic diol polyether structure, designed to address poor wetting, cratering, poor leveling, and foam-control challenges in waterborne industrial coatings, printing inks, adhesives, and other systems. Its core function is to efficiently lower dynamic and static surface tension (surface tension of a 0.1% aqueous solution: static 33.2 dyn/cm, dynamic 34.3 dyn/cm), suppress foam formation, and eliminate microbubbles, combining wetting and foam control in a single product. Compared with conventional wetting agents, it is APEO-free, broadly compatible, and effective at low dosages (0.3%-1%), making it a suitable option for high-speed coating, printing, and demanding waterborne systems.
Core Product Information
| Item | Specification/Result |
|---|---|
| Product model | FS-620 |
| Chemical name | Acetylenic diol polyether surfactant |
| CAS No. | 9014-85-1 |
| Appearance (25 °C) | Light yellow to yellow liquid |
| Color (Pt-Co) | 350 APHA (typical 150) |
| Active Matter (wt.%) | ≥98% (typical 98.1%) |
| Cloud point | 32 – 36 °C (typical 34.5 °C) |
| Surface tension (0.1% aqueous solution, 25 °C) | Static: 33.2 dyn/cm; Dynamic: 34.3 dyn/cm |
| Safety note | Non-flammable and non-explosive; mild skin irritant. |
Main Features and Advantages
- Excellent wetting performance: Thanks to its gemini structure, it rapidly lowers the dynamic and static surface tension of waterborne systems, effectively resolving cratering and fisheyes on hard-to-wet substrates (such as plastics and metals).
- Efficient foam control: It combines foam-suppression and deaeration capabilities, and is especially suited to suppressing microbubbles generated during production mixing and high-speed coating; it can be used as an alternative to defoamers.
- Promotes flow and leveling: It improves coating uniformity, giving the coating better appearance and performance.
- Environmental friendliness and compatibility: APEO-free and compatible with most anionic and nonionic systems; environmentally friendly and safe.
Recommended Application Fields
- Waterborne industrial coatings:
- Application scenarios: Metal protective coatings, plastic primers, automotive parts coatings, and industrial machinery coatings based on waterborne acrylic, epoxy, polyurethane, and other systems.
- Problems addressed: Improves wetting of low-surface-energy substrates (e.g., PP and PE plastics) and prevents cratering; improves coating leveling and eliminates brush and roller marks; controls bubbles generated during high-speed mixing, pumping, and spraying of the coating.
- Waterborne printing inks and overprint varnishes:
- Application scenarios: Flexographic and gravure printing inks, overprint varnishes, etc.
- Problems addressed: Ensures the ink spreads and wets the substrate (e.g., film, foil) rapidly during high-speed printing, avoiding incomplete printing or white spots; reduces foam in the ink recirculation system to ensure consistent print quality.
- Paper coatings:
- Application scenarios: Surface coating agents for premium packaging materials such as coated paper and ivory board.
- Problems addressed: Promotes uniform distribution of the coating on the paper surface for a smooth, even coating; suppresses foam generation during high-speed coating.
- Leather finishing agents:
- Application scenarios: Waterborne leather top coats and effect coats.
- Problems addressed: Helps the finishing agent distribute evenly on the uneven surface of natural leather, enhancing coverage and leveling.
- Adhesives and sealants:
- Application scenarios: Waterborne pressure-sensitive adhesives, laminating adhesives, assembly adhesives, etc.
- Problems addressed: Improves initial wetting of the substrate and enhances bonding; controls bubbles during high-speed coating (e.g., knife coating, roller coating) to avoid bubbles or voids in the final adhesive layer.
Usage and Recommended Dosage
Suggested addition sequence:
- Add after the other surfactants and polymers to ensure full dissolution or dispersion.
- Add before pigments, fillers, and other solid materials so it preferentially wets solid surfaces and suppresses foam during subsequent mixing.
- Use appropriate occupational protection (safety goggles and gloves).
- Check the product condition (if it solidifies or crystallizes at low temperature, warm it to room temperature or above its melting point and stir; it will return to its original state without affecting performance).
- Calculate the required dosage.
- Slowly add FS-620 to the system under moderate stirring.
- Continue stirring for 15-30 minutes to ensure uniform mixing.
Recommended dosage (based on total formulation):
- Waterborne industrial coatings: 0.3% – 0.5%
- Waterborne printing inks and overprint varnishes: 0.3% – 1.0%
- Other fields (e.g., adhesives): 0.3% – 1.0%
- Note: The specific optimal dosage should be determined by a dose-response study according to the formulation, equipment, and process conditions. It is recommended to start at a low dosage.
Safety and Storage
- Safety note: Wear safety goggles and gloves during handling. On skin contact, rinse with plenty of water and soap; if it gets into the eyes, rinse immediately with plenty of water for at least 15 minutes and seek medical attention.
- Storage conditions: Store sealed in a cool, ventilated, dry place, away from heat, sparks and open flames, and other heat sources.
- Packaging: 25 kg drums, 180 kg drums, 950 kg drums.
- Shelf life: 2 years from the date of manufacture under the specified storage conditions.
- Transport classification: (Compliant with GB/T 190-2009).
Frequently Asked Questions
Q: Can FS-620 be used directly as a defoamer?
A: Yes. FS-620 provides good foam control and deaeration, and is especially suited to suppressing microbubbles. In systems without severe foaming problems, it can be used alone as a dual-function wetting and defoaming additive. If the system foams heavily, we recommend combining it with a dedicated defoamer.
Q: Is this product stable at elevated temperatures?
A: The cloud point of FS-620 is about 34.5 °C. Below the cloud point, it dissolves in the aqueous phase and performs effectively; above the cloud point, it may separate from the system and impair performance. Please ensure it is used under process conditions below its cloud point.
Q: How do I determine the dosage best suited to my production process?
A: The optimal dosage depends on your specific formulation, equipment, and process conditions. We strongly recommend starting from the lower end of the recommended range (e.g., 0.3%) and running a dose-response study (e.g., 0.3%, 0.5%, 0.7%), evaluating coating appearance, leveling, and foaming to determine the optimal dosage. Our technical support team can provide testing guidance.
Q: How compatible is FS-620 with various resins?
A: FS-620 is compatible with most anionic and nonionic resins. In certain special formulations, however, we still recommend a small-scale compatibility test before use to check for abnormalities such as flocculation or phase separation, to be on the safe side.
Q: Can it fully replace conventional silicone defoamers?
A: In most waterborne systems, FS-620 can significantly reduce or even fully replace conventional defoamers. Its advantage is that it defoams without introducing a cratering risk while also providing wetting. For extremely stubborn foam, it can still be combined with a conventional defoamer, but the defoamer dosage can be substantially reduced.
Contact Us
- If you need free samples, a detailed technical data sheet (TDS) or a safety data sheet (SDS), or have any technical questions, please contact us at any time:
- Company: Tianjin Hi-Perferal Advanced Materials Co., Ltd.
- Address: No. 2-1, Zhenghua Road, Caozili, Wuqing District, Tianjin
- Technical service hotline: 022-82910362
- Website: www.surfychem.com